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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Oct. 11, 2021
Nov. 02, 2020
Dec. 18, 2019
Dec. 14, 2018
Sep. 30, 2021
Jun. 30, 2021
Apr. 30, 2021
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Apr. 30, 2011
Share-based Compensation                            
Stock-based compensation expense                     $ 4,000 $ 4,500 $ 3,600  
Restricted Stock [Member]                            
Share-based Compensation                            
Restricted shares granted (in shares) 8,199                   36      
Restricted stock closing price awarded (in dollars per share) $ 36.59                   $ 61.00      
Stock-based compensation expense $ 100                   $ 4,000 4,500    
Annual incremental vesting percentage 33.00%                          
Forfeited, Number of Shares                     6      
Vested, Number of Shares                     63      
Restricted Stock [Member] | Chief Financial Officer [Member]                            
Share-based Compensation                            
Stock-based compensation expense                     $ 100      
Forfeited, Number of Shares           5,598                
Restricted Stock [Member] | Non-employee directors [Member]                            
Share-based Compensation                            
Restricted shares granted (in shares)   16,500           18,000 21,000          
Restricted stock closing price awarded (in dollars per share)               $ 67.97 $ 87.21 $ 71.56        
Vesting period   1 year             1 year          
Stock-based compensation expense                       1,100 $ 1,600  
Per employee restricted shares granted (in shares)   1,500           1,500 1,750          
Restricted Stock [Member] | Executive officers [Member]                            
Share-based Compensation                            
Restricted shares granted (in shares)   9,334 31,158 14,522                    
Restricted stock closing price awarded (in dollars per share)   $ 67.97 $ 87.63 $ 85.67                    
Stock-based compensation expense                     $ 1,000 $ 1,400    
Annual incremental vesting percentage                       33.00% 33.00%  
Restricted Stock [Member] | Key Employees [Member]                            
Share-based Compensation                            
Vesting period                     2 years      
Restricted Stock [Member] | Chief Executive Officer [Member]                            
Share-based Compensation                            
Stock-based compensation expense         $ 700   $ 300       $ 700      
Stock Options [Member]                            
Share-based Compensation                            
Award expiration period         5 years                  
Vesting period         2 years                  
Options granted (in shares)         5,000                  
Option grant date fair value         $ 200           98      
Option grant date fair value (in dollars per share)         $ 39.20                  
Unrecognized stock based compensation expenses                     $ 200      
Unrecognized compensation cost period                     24 months      
2011 Management Incentive Plan [Member]                            
Share-based Compensation                            
Common stock shares authorized (in shares)                           1,500,000
2020 Management Incentive Plan [Member]                            
Share-based Compensation                            
Common stock shares authorized (in shares)             1,500,000              
Award expiration period             5 years